Synthesis, structure, and properties of a new trinuclear iron cluster, [(MeOH)(H2O)2Fe3(μ 3-O)(μ-OOCC6H4OCH2C 5H4NH)6](CIO4)7 · · 8MeOH · 3.5H2O

Article abstract of DOI:10.1007/BF01457792

Reactions of iron(III) salts with a new bidentate ligand, which is potentially capable of forming binuclear iron complexes upon complexation, were studied. Under various conditions, we succeeded in isolating only the trinuclear cationic complex [Fe^III₃(O₂CR)₆(μ ₃-O)]⁷⁺ (1), where RCO₂ is 2-(pyrid-2-ylmethoxy)benzoic acid protonated at the pyridyl moiety. The structure of 1 was established by spectral, magnetic, and X-ray structural studies. Cyclic voltammetry in MeCN in the temperature range from -35 to 20°C demonstrated that 1 undergoes successive Fe^III→Fe^II reduction in three one-electron stages, which is indicative of the electronic interaction between iron atoms in the complex.